Oscillation-receiving apparatus.



: E. E. BUTCHER. OSCILLATION RECEWING APPARATUS.

APPLICATION FILED MAY I9. 1914.

' Patented June 5, 1917- s SHEETS-SHEET 1 3 mm MM E, E. BUTCHER.

OSCILLATION RECEIVING APPARATUS.

APPLICATION FILED MAYIQ, 1914.

Patented June 5, 1917.

a SHEETS-SHE}! 2.

E.'E. BUTCHER.

OSCILLATION RECEIVING APPARATUS.

APPLICATION FILED MAY i9. r914.

1 298 M 70 Patented June 5, 1917.

3 SHEETS-SHEET 3.

ELMEE IE. BUTCHER, F INTERLAKEN, NEW JERSEY, ASSIGNGB Ti.) MARGGNI TELEGRAPH COMPANY OF AMERICA, A CORPORATION (7F NEW JTJItSEFZ.

' oscIaLncuon-nncmvme Arrhenius.

simple character, having fetfladjustments,

' drawings which accompany the specificatiom I shall illustrate forms which my invention and by which received oscillations may be greatly amplified. v My invention may be applied to the receptionof electrical oscillations irrespective.

ofthe manner in which they are produced or of their particular character and may be used in any connection in which applicable, as, for instance, in wireless'or Wire telegraphy, or wireless or wire tolephony.

I shall describe my invention in conneclh'd'er. These are the only adjustments tion with wireless telegraphy and in the may take. These drawings, however, are intended only to show operative 'forms of my invention and are therefore diagrammatic and illustrative only, and should not be taken as showing the only forms or applications in which my invention finds utility.

Figure 1 shows diagrammatically the electrical connections of the receiving end of a wireless telegraph system embodying my invention; Fig. 2 shows a modified form of the electrical connections; Fig. 3 is a side view of the means for electrostatically coupling the circuits and Fig. 4 is an end view thereof partly in section. Referring to Fig. 1 I have shown an aerial at 1. This aerial may take any suitable form and includes in its circuit a metallic element, which is shown in the drawings,

. for the sake of illustration, as being in the form of a cylinder 2. The secondary orde j V .grounded circuit.

"ciples, however, of the apparatus oi tector circuit comprises an inductance 3 which is preferably in theform of a relatively long coil of wire and is grbunded at 4. This point also constitutes the ground for the aerial circuit. The opposite end of the inductance 3 is connected to an element of a detector 5. l have shown the detector 5 in the form of a multiple element valve detec- Specification of Letters Patent.

it is found .du'ctance included therein varied.

tor, but this is not the only type which may be used, since other forms of detectors, such as crystal detectors, for instance, may be advantageously employed. The multiple element valve detector 5 Ihave illustrated,

comprises a sealed vessel inclosing three ele ments, a grad element 6 to which mductauce 3 is connected, a filament element 7 which is Patented June 5, Application filed May 19, 1914. Serial Ito. 839,483.

till

circuits of the detector may be modified. to accord with the type of detector used, or the Y particular conditions oi its use.

In the operation of my device the metallic element 2 is moved along coil 3, and the closeness of the electrostatic coupling between the coil and the metallic element is varied in any suitable manner, as by increas ing or decreasing the diameter of the cylwhich my improved device requiress By the movement of metallic element 2 the aerial and secondary or detector circuits are simultaneously tuned and the amount of in- The ar rangement is such that's pibint of maximum potential is formed at the grid element of the detector 6. In Fig. 2 I have shown a.

modification of my apparatus which c0nsists essentially 1n reversing the electrostatic coupling shown in Fig. 1, but leaving the aerial circuit electrostatically coupled. to the detector circuit. While in Fig. 1 the aerial is connected to the metallic element of the coupling, in Fig. 2 it is connected to the inductance and the .earth is connected to the metallic element instead of directl to, the inductance as in Fig. 1. Also" in Fig.

the connection of the secondary circuit to ree" theground is efiected through the electro. staticcouplingjnstead of directly, tut this does nottialter its essential character as a The underlying rin- 0th Figs. 1 and 2 are the same and the method of operation is essentially identical.

Figs. 3 and 4 show a convenient mecha nism for varyingthe electrostatic coupling between the metallic element 2 and the coil 3. Referring to these figures it will be seen that the, metallic element 2 is in the form of a split cylinder, the upper ends being conanectedliy'means of a thumb-screw 13 which passes through a balll mounted on one edge of the cylinder, and-is attached to a pivot 15 on the other. The cylinder is supported upon a slider 16', which is adapted to slide along a bar 17, the under side of which has a rackl8 formed in it.

' that the cylinder may be locked in any given position relatively to the coil.

As I have pointed out above, the forms of my invention 1 have illustrated and d5- scribed are not the only forms it may tak,

andthey may be altered in manners which will be apparent to those skilled'in the art,

Without departing from the spirit of my invention, and I therefore do not intend to confine myself to the specific forms shown cults, comprising the coil and a metallic "and described.

- What I claim is: 4

L In an oscillation rece ving apparatus, a grounded open secondary circuit containing an inductance and a detector and tuned odicity of the received oscillations.

'2. In an oscillation receiving. apparatus, an open oscillating circuit contammg an 1nductance and connected to the earth at one end and to a detector at a point of maximum potential remote from the earthed point and an aerial circuit tuned to the periodicity of the received oscillations electrostatically I coupled thereto. I

3. In an oscillation receiving apparatus,

an open oscillating circuit containing an induct-ance and a detector and an oscillating circuit electrostatically coupled; thereto at the point at which the inductance is included in the, circuit. 7 p l. In an osc llation receiving apparatus, an aerial circuit contain ng one element of an electrostatic coupling and a detector circuit containing an inductance and "a detector, the inductance constituting the otherelemcnt of the electrostatic coupling.-

5. In an oscillation-receiving apparatus,

an aerial circuit containing once-lenient of static coupling.

- I meant? an electrostatic coupling and an open detec- I tor circuit grounded at one end, containing an inductance and connected to a detector at a point of maximum potential remote from the earthed point, the inductance constituting the other element of the electro- 6. In an oscillation receiving apparatus, an open oscillating circuit containing an in tial remote from the earthed point, a second oscillating circuit adapted to excite the first and electrostatically coupled thereto,means for varying the closeness of thecoupling and means for varying the amount of the inductance included in the two circuits.v

7. In an oscillation receiving apparatus,

duotance, grounded at one end and connected I to a detector at a point of maximum potena secondary circuit containing an inductance in the form of a coil an oscillating circuit adapted to excite the secondary circuit and means for electrostatically coupling the cirmemher in proximity to thecoil and adapted to be moved relatively to it.

8. In an oscillation receiving apparatus, a secondary clrcuit conta1mng an inductance in the form of a coil, an oscillating circuit adapted to excite the secondary circuit,'and

means for electrostatically coupling the cir-,

- cults and for varying the'coupling, comprising a cylinder surrounding the coil, means for contracting the cylinder and means for moving the cylinder longitudinally of the coil. Y

. 9. In an oscillation receiving apparatus, a secondary circuit, an exciting circuit and means for e'lectrostatically coupling the two circuits and for varying the coupl ng, comprising a coil, a split cylinder "slidably mounted thereon, means for contracting the cylinder; and for holding it in its contracted ELMER E. science;

ml for locking) "Witnesses: I v

lVAL'rnn S. Jones i position and meansfor moving the cylinder have hereto signed 

